R1 and R2 blink reflex latencies were investigated blind in 10 patients with cervicogenic headache, 11 patients with chronic tension-type headache, 11 patients with migraine, and 9 headache-free controls. There were no R1 or R2 latency differences between the four groups. The latency of R1 increased significantly with headache duration in tension-type headache patients. Shorter R1 latencies were found on the symptomatic side than on the non-symptomatic side in cervicogenic headache patients. The results suggest that a state of hyperactivity may be present in the ipsilateral trigeminal nucleus in cervicogenic headache. Hypoactivity, however, may develop over time in tension-type headache.
BovimGCervicogenic headache. A review.Eur J Pain1993;14:60–4
9.
SchoenenJJamartBGerardPLenarduzziPDelwaidePJExteroceptive suppression of temporalis muscle activity in chronic headache.Neurology1987;37:1834–6
10.
International Headache Society, Headache Classification Committee.Classification and diagnostic criteria for headache disorders, cranial neuralgia and facial pain.Cephalalgia1988;8Suppl 7:1–96
11.
ShahaniBThe human blink reflex.J Neurol Neurosurg Psychiatry1970;33:792–800
12.
Ongerboer de VisserBWThe corneal reflex: electrophysiological and anatomical data in man.Progr Neurobiol1980;15:71–83
13.
BerardelliACruccuGManfrediMRothwellJCDayBLMarsdenCDThe corneal reflex and the R2 component of the blink reflex.Neurology1985;35:797–801
14.
HiraokaMShimamuraMNeural mechanisms of the corneal blinking reflex in cats.Brain Res1977;125:265–75
15.
KerrFWLOlafsonRATrigeminal and cervical volleys. Convergence on single units in the spinal grays at C-1 and C-2.Arch Neurol1961;5:171–8
16.
KerrFWLA mechanism to account for frontal headache in cases of posterior-fossa tumors.J Neurosurg1961;18:605–9
17.
BovimGSandTCervicogenic headache, migraine without aura and tension-type headache. Diagnostic blockade of greater occipital and supraorbital nerves.Pain1992;51:43–8
18.
CruccuCFerracutiSLeardiMGFabbriAManfrediMNociceptive quality of the orbicularis oculi reflexes as evaluated by distinct opiate- and benzodiapine-induced changes in man.Brain Res1991;556:209–17
19.
McCallRBAghajanianGKSerotonergic facilitation of facial motorneuron excitation.Brain Res1979;169:11–27
